Correction :

8 + 0 = 8	17 - 17 = 0
6 × 8 = 48	31 - 11 = 20
45 - 23 = 22	47 - 24 = 23
8 + 16 = 24	15 + 4 = 19
16 + 8 = 24	15 + 15 = 30
18 - 4 = 14	20 + 10 = 30
10 : 5 = 2	30 - 22 = 8
6 + 23 = 29	30 : 3 = 10
14 : 7 = 2	0 + 23 = 23
15 - 0 = 15	16 + 18 = 34